格式化双到小数点后两位

本文介绍了格式化双到小数点后两位的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我一直试图让这个打印出来是到小数点后两位的回答。所涉及的所有数学有留在两位小数的格式。我已经尝试了一些事情，我不知道该怎么改，使这项工作。

双pdt1 = 239.99;双pdt1Total;双pdt2 = 129.75;双pdt2Total;双pdt3 = 99.95;双pdt3Total;双pdt4 = 350.89;双pdt4Total;双工资= 200;双百分比= 9;双总;双答复;双I = 100;双A;双B：双C;双D;Console.Write（输入产品＃1号售出：）;一个= Convert.ToInt32（到Console.ReadLine（））;Console.Write（输入产品＃2号出售）;B = Convert.ToInt32（到Console.ReadLine（））;Console.Write（输入产品＃3号出售：）;C = Convert.ToInt32（到Console.ReadLine（））;Console.Write（输入产品＃4号卖：）;D = Convert.ToInt32（到Console.ReadLine（））;pdt1Total = A * pdt1;pdt2Total = B * pdt2;pdt3Total = C * pdt3;pdt4Total = D * pdt4;总=（pdt1Total + pdt2Total + pdt3Total + pdt4Total）;的String.Format（{0：0.00}，总数）;的String.Format（{0：0.00}，回答=（总*百分比/ I）+工资）;Console.WriteLine（本周收益：+答案+）;

解决方案

即使你叫的String.Format 也不会改变原有的价值。但它会返回格式化字符串。所以请尝试以下

Console.WriteLine（本周收益：+的String.Format（{0：0.00}，答案））;

I have been trying to make the answer this prints out to be to two decimal places. All the math involved has to stay at that format of two decimal places. I have tried a few things and I am not sure what to change to make this work.

double pdt1 = 239.99; double pdt1Total; double pdt2 = 129.75; double pdt2Total; double pdt3 = 99.95; double pdt3Total; double pdt4 = 350.89; double pdt4Total; double wage = 200; double percentage = 9; double total; double answer; double i = 100; double a; double b; double c; double d; Console.Write("Enter number sold of product #1: "); a = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter number sold of product #2: "); b = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter number sold of product #3: "); c = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter number sold of product #4: "); d = Convert.ToInt32(Console.ReadLine()); pdt1Total = a * pdt1; pdt2Total = b * pdt2; pdt3Total = c * pdt3; pdt4Total = d * pdt4; total = (pdt1Total + pdt2Total + pdt3Total + pdt4Total); string.Format("{0:0.00}", total); string.Format("{0:0.00}", answer = (total * percentage / i) + wage); Console.WriteLine("Earnings this week: "+answer+"");

解决方案

even you call string.Format it will not change original value . but it will return formatted string. so try below

Console.WriteLine("Earnings this week: " +string.Format("{0:0.00}", answer));